As I understand it , there was a big change between Magento 1.3 and 1.4 - then the next big change was at 2 ( with maybe some sort of change in version 1.6 )
The problem I have is translating data from an old version of Magento to a new one. I want to know where to find the differences in attribute model ( or some idea as to where I would start looking ) . I'm a bit stumped on how to start with this , the documentation is very thin - and I've purchased a couple of extensions that supposedly do this , but the code / service is absolutely terrible.
So - my specific issue is that I need to map old data to new - and I can't find a good document or reference to show me the differences. specifically around Magento 1 for now.